Probability of damaging thunderstorm winds or wind gusts of 50 knots or higher within 25 miles of a point. Hatched Area: 10% of greater probability of wind gusts 65 knots or greater within 25 miles of a point.
Day 1 Wind Risk
Area (sq. mi.)
Area Pop.
Some Larger Population Centers in Risk Area
5 %
15,474
4,883,013
Houston, TX...Corpus Christi, TX...Pasadena, TX...Sugar Land, TX...Missouri City, TX...
Probabilistic Large Hail Graphic
Probability of hail 1" or larger within 25 miles of a point. Hatched Area: 10% or greater probability of hail 2" or larger within 25 miles of a point.
Day 1 Hail Risk
Area (sq. mi.)
Area Pop.
Some Larger Population Centers in Risk Area
5 %
14,684
4,245,072
Houston, TX...Corpus Christi, TX...Pasadena, TX...Sugar Land, TX...Missouri City, TX...
SPC AC 191630
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1030 AM CST Sat Dec 19 2020
Valid 191630Z - 201200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS THE
MIDDLE/UPPER TEXAS COAST...
...SUMMARY...
Isolated strong to severe thunderstorms may occur today across parts
of the middle/upper Texas Coast.
...Middle/Upper Texas Coast...
A shortwave trough over Texas/Oklahoma will continue to spread
generally eastward and reach the Tennessee Valley and middle Gulf
Coast late tonight. In advance of a southeastward-moving cold front
across northeast/central Texas, multi-layer cloud cover remains
prevalent late this morning as middle 60s F surface dewpoints slowly
spread inland along the middle/upper Texas coast. Modest
destabilization will steadily occur through early/mid-afternoon, but
the persistent cloud cover and increasing showers/thunderstorms will
probably limit the spatial extent of appreciable pre-frontal
destabilization over inland areas. Regardless, an increase in
surface-based deep convection is possible along the immediate coast
this afternoon. Moderately strong deep-layer/low-level shear would
support some supercells, with locally damaging winds and/or a brief
tornado possible.
It is probable that near/pre-frontal storm mergers across the
coastal plain should lead to an offshore shift of a convective band
by late afternoon/early evening. Accordingly, the most intense
convection should be relegated to the western Gulf of Mexico
tonight.
..Guyer/Lyons.. 12/19/2020
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 2000Z
| 
)
